Coursework - THERMAL CALCULATION AND DETERMINATION OF THE MAIN PARAMETERS OF THE ZMZ 402 ENGINE

Content

1. Introduction....  4

2 . Thermal calculation of the engine............  5

           2.1 The process of filling....  5

           2.2 Compression process.........  5

           2.3 Combustion process.........  6

           2.4 The process of expansion.............  8

           2.5 Release process....  8

           2.6 Indicators....  8

           2.7 Effective performance....  9

           2.8 Determination of basic dimensions......  11

           2.9 Analysis of the results obtained....  12                                               

3. Dynamic calculation....  13

           3.1 Construction of an indicator diagram..................  18

           3.2 Rebuilding the indicator chart.......  19

           3.3 Charting the forces of P and J..........  20

           3.4 Charting the forces of T and K....  20

           3.5 Construction of a polar diagram of loads on the connecting rod neck... 20

           3.6 Drawing a graph of engine torques................... 21

 4. Conclusion.........  23

 5. Literature.........  24

INTRODUCTION

The thermal calculation of the engine is used to determine the parameters of the working fluid in the cylinder of the engine, as well as the estimated indicators of the working process, to assess the power and economic indicators that allow you to estimate the power and fuel consumption.

The basis of the above calculation methodology is the method of V.I. Grinevetsky, further improved by E.K. Mazing, N.R. Briling, B.S. Stechkin and others.

Conducting a thermal calculation allows you to master the relationship between the individual elements of the operating cycle and get an idea of the influence of various factors on the performance of the  engine as a whole.

The task of dynamic calculation is to determine the forces acting in the mechanisms for converting the thermal energy of the working medium into the mechanical operation of the engine.

In the present work, thermal and dynamic calculations are performed for the rated power mode.